Monongahela River

Table of Contents

Introduction References & Edit History Related Topics

Images

Read Next

Close up of a hand placing a ballot in a ballot box. Election vote voter voting

Have Any U.S. Presidents Decided Not to Run For a Second Term?

What State Is Washington, D.C. In?

The United States Supreme Court building, Washington, D.C.

14 Questions About Government in the United States Answered

Bar graph of the United States Death Toll during major events. Infogram chart.

U.S. Death Toll During Major Events

The Battle of New Orleans, by E. Percy Moran, c. 1910. Andrew Jackson, War of 1812.

26 Decade-Defining Events in U.S. History

Discover

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

9 of the World’s Deadliest Snakes

Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.

6 Animals We Ate Into Extinction

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

7 of the World’s Deadliest Plants

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.

9 Memorials and Monuments in the United States

Monongahela River

river, United States

Written and fact-checked by The Editors of Encyclopaedia Britannica

Last Updated: May 19, 2025 • Article History

News •

12-year-old boy who drowned in Monongahela River remembered as soft-spoken, polite • May 18, 2025, 11:03 AM ET (CBS)

Search and rescue teams recover child's body from Monongahela River • May 18, 2025, 11:03 AM ET (CBS)

12-year-old boy who drowned in Monongahela River remembered for soft-spoken nature, polite personality • May 18, 2025, 11:03 AM ET (CBS)

Man's body pulled from Monongahela River in Washington County • May 15, 2025, 3:52 AM ET (CBS)

Man's body pulled from Monongahela River • May 14, 2025, 7:36 PM ET (CBS)

Monongahela River, river formed by the confluence of the Tygart and West Fork rivers in Marion county, West Virginia, U.S. It flows 128 miles (206 km) in a northerly direction past Morgantown into Pennsylvania, past Brownsville and Charleroi, joining the Allegheny River at Pittsburgh to become a major headwater of the Ohio River. In its upper reaches the river furnishes hydroelectric power to several cities. The Monongahela, made navigable by means of locks, is a major barge route, carrying coal, coke, iron, and steel.

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by John M. Cunningham.